I want a Green Burial. My Mum wants a really really really cheap funeral so a green burial appeals to her as you can have a cardboard coffin. Mum reckons dying is way too expensive these days and there ought to be a "fast funeral joint" called "Funerals R Us" or (my suggestion) "McDead".
Yes in the old days being buried alive was not at all uncommon. They do sometimes find graves where the poor person has even turned over on their side and pushed their fingers down their throat in a desperate bid to somehow force air down. It's not likely to happen these days though, is it, with the sensitive equipment we have. We're more likely to be kept "breathing" by artificial means, long after we've really "died". Also with a green burial you aren't buried so far down, so your chances of getting out and terrifying the wits out of your loved ones are much greater.
My mother in law has a terrible fear of having a gravestone erected over her, with its weight "pressing down on her". Her mother had the same fear. My mother in law is going for cremation to avoid the risk of having any lumps of stone put on her.